The bird flew to a stick in the pond, around 10 metres from the camera. It remained wary of my presence and eventually flew off.
During the observation period, the bird was alone. Both on the shore and out on the stick, it incessently bobbed its tail. In flight, it uttered soft "ticks".
Comparing my notes and images with the description in Pizzey and Knight, Field Guide to the Birds of Australia allows me to feel certain that the bird was a Common Sandpiper - a first for me.
I had two brief opportunities to observe this bird. It did not present itself in favourable lighting on either occasion. Nevertheless, the Pentax DB100 captured sufficient detail for confirming its identity.